Abstract: The application discloses a composite reinforced moisture-proof fiberboard, and a preparation apparatus and method thereof, and belongs to the technical field of moisture-proof fiberboard preparation apparatus. A wooden board that needs an adhesive application process is placed on a conveying assembly and conveyed to a lower part of a grinding disc assembly. Then, a first levelling assembly, a second levelling assembly, and a vertical electric telescopic rod are started to adjust the grinding disc assembly to perform grinding and adhesive application on the wooden board. After adhesive application is completed, the conveying assembly is started again to drive the wooden board to move to perform high temperature drying treatment through a high temperature drying assembly. An adhesive solution thrown out during grinding and adhesive application falls onto side return covers and flows back to a recovery pool for collection and reuse.

Abstract: The invention relates to a process for preparing 1,2?-benzisothiazoline-3-one according to formula (I), comprising the following steps: (a) reacting a 2-halogenbenzonitrile compound of general formula (II) with a reaction mixture, containing: (i) alkaline sulphide and/or alkaline hydrogen sulphide and (ii) an alkyl halide compound, represented by general formula (III): R1X (III) for producing an intermediate product of general formula (IV), and (b) reacting the intermediate product of general formula (V) obtained in step (a) with a halogenating agent or an oxidant and subsequent reaction of the 2-(alkylsulfoxy)benzonitrile with an acid to form 1,2-benzisothiazoline-3-one as well as a halide compound of general formula (V) R1X (V).